Chasmops
praecurrens
Trilobite
Order Phacopida, Suborder Phacopina,
Superfamily Phacopoidea, Family Pterygometopidae
Geologic
Time : Middle Ordovician
Size: 50
mm
Fossil Site:
Asery Level deposits of the Wolchow
River region near Saint Petersburg, Russia
|  Coming
from the Middle Ordovician Asery Level deposits of the Wolchow River
region near
Saint Petersburg, Russia, this is an example of the Phacopida trilobite Chasmops
praecurrens. It is a very rare trilobite with but a few found annually
among many hundreds of trilobites collected. Its caramel-colored Calcite
shell is well set off by the white limestone matrix. Note the fine preservation
of the glabellar pustules that
are characteristic of
the species.
Also see: Russian
Trilobites Gallery | |
